Finding the Fourth Proportional to 9,612, 13,264.76 and 5,420.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,612 : 13,264.76 = 5,420.25 : x
2. Step 2: Convert to fraction form
   9,612/13,264.76 = 5,420.25/x
3. Step 3: Cross multiply
   9,612x = 13,264.76 × 5,420.25
4. Step 4: Simplify right side
   9,612x = 71,898,328.94
5. Step 5: Solve for x
   x = 71,898,328.94/9,612
6. Step 6: Final answer
   x = 7,480.06